From b240fb38f05349a41e69a64ee546af70190ef25c Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Sat, 12 May 2012 19:47:30 +0200 Subject: [PATCH] drm/i915: disable gmbus on i830 The hw just returns garbage. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49838 Signed-Off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_i2c.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c index e04255e..61752f1 100644 --- a/drivers/gpu/drm/i915/intel_i2c.c +++ b/drivers/gpu/drm/i915/intel_i2c.c @@ -490,6 +490,10 @@ int intel_setup_gmbus(struct drm_device *dev) /* By default use a conservative clock rate */ bus->reg0 = port | GMBUS_RATE_100KHZ; + /* gmbus seems to be broken on i830 */ + if (IS_I830(dev)) + bus->force_bit = force_bit; + intel_gpio_setup(bus, port); } -- 1.7.10